How to make lighstreamer run in streaming mode instead polling mode, specially in show case "Hello World Socket" like

I use Allegro version. Data Message sent by socket application, the data contain market value that highly need realtime condition.

If I use polling, it seem data is queing FIFO (First In First Out), this is good. But if web client application, lost connection or something, for a while, for example 10 second. Server sending expire data that late for 10 second.

Is there any solution for this problem ?